[YOUTUBE "suZcGoRLXkU"] The full trailer for Insurgent, the follow-up to March's blockbuster film Divergent, was released Friday, and fans of Veronica Roth's book series were surprised to see a mysterious box that featured prominently.

The best-selling book The Fault in Our Stars, narrated by a 16-year-old cancer patient, has been banned from Riverside Unified School District middle schools in California over sexual content, but it is still allowed in high schools.